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@iti-12h .tutes stzut @Hite JNATHAN R. WHIT'IEMORE, OF CHICOIEE FALLS,IVIASSAGHUSE'ITS.

Letters Patent lo. 63,592, dated April 2, 1867.

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T() ALL WHOM IT MAY CONCERN:

"Be it known that I, JONATHAN R. WHITTEPJORE, ol Chicopee Falls, countyof Hampden, and State of lil-assu.- chusctts, have invented a new andimproved Window Fastener, of which the following is` a full, clear, andexact description of the saule, reference being had to theaccompanyingdrawings, and makiiig a part of this specification, inwhich- Figure 1 is a plain front side view of'the holder complete.

Figure 2, Va plain front side View of the slide C, with the doubleself-noting cani, Il E and attached.

Figure 3 is the lever B B, with its cam I-I H H, and rib z L.

In lig. l, A Ais the body or frame of the holder, to which are attachedthe lever B Il, the slide C, and the double self-acting cam E E and I".The slide C passes through an aperture in the frame A A, to keep itinplace. This aperture is formed by the sides I I, and the covering overit, :ind is about three-eighths of an inch square, more or less. Theslide C is represented in part by the dotted lines at the side runningparallel with 'the dotted lines I I. The lever B B, with its cam II H H,and rib t, is also attached to this frame A A by means of the screw D,which runs through it. The rocker E E and I1 is a self-acting cam whichpresses against the Window strip to hold it, and is hinged by the pinseen at F, to the slide C. G represents the window strip, or that partci' the window easing against which cam E E is made to press. Upon theside of the lever B B. and directly upon the edge of the cam Il H H, isa. rib, h It. This rib or projection projects into a space, c, in theslide C, iig. 1. When motion downwards isgiven to the lever I3 B, itturns upon the screw l), and the cani H I-I Il presses against ashoulder of the slide C, and forces itin the direction of the windowstrip G, and iinnlly presses the cam E E against said window strips forthe purpose oi' holding the window from moving either up or down., Whenthe cam E E is pressed against the window strip G, and the window isforced downwardly, the friction ,of the window upon this. cam, E E,causes the cam also to be forced downwards, (or that part of it comingin contact with the windomstrip as it is hung at I?) and being a cam,it' rolls in, and thus produces a harder pressure upon the window stripthc harder it is forced downwards, so that by the use of the cam E E itbecomes (after the slide is forced against it) a self-tightener simplyby the motion or weight of the window. The same result is also producedif the window is raised or attempted to be raised. It is, as will benoticed, a double cam, or a cam in either direction from the centre of EE, the turning point being ut F, and thus the Window can neither beraised or lowered when held by my fastener. To loosen the window thelever B B is raised, which removes the pressure, and the rib 7L 7L actsupon a. little projection (running downwards) at the end of the slide C,and draws it back, so that it will not rub upon the window strip inmoving the window up or down. I am aware that levers With a cam, like HH I-I, have been used separate, which apply direct upon the windowstrip, but by the use of the slide C the friction and Wear upon thewindow consequent upon its us'e separately, is avoided. Also by thestill additional use of the double scltaoting cam E E, it becomes a verysure holder of the window, and that, too, without any wear of the windowstrip.

Having thus described my improvements, what I claim as my invention, anddesire to secure by Letters Patent, is v I claim the cam H H I-I, slideC, and self-acting cam E E and F, when used in combination,substantially as described,

JONATHAN R. WHITTEMORE.-

Witnesses:

M. J. CALLAN, J. F. CALLAN.

